
TY  - JOUR
A1  - Bastow, TJ 
A1  - Campbell, ID 
A1  - Whitfield, HJ 
T1  - An arsenic-75 nuclear quadrupole resonance study of &#945; and &#946; As<sub>4</sub>S<sub>3</sub>
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1972
VL  - 25
IS  - 11
SP  - 2291
EP  - 2299
KW  - 
UR  - https://doi.org/10.1071/CH9722291 
N2  - The nuclear quadrupole resonance frequencies of 75As in the &#945; and &#946; forms of As4S3 have been measured at 77, 195, and 293 K. The frequencies at 77 K were:   &#945; phase 64.87 65.94 79.56 MHz  &#946; phase 65.42 67.16 79.65 MHz  An analysis is presented in terms of Townes-Dailey theory and of the temperature dependence in terms of Bayer-Brown theory. The differences in frequencies of the &#945; and &#946; forms were attributed to the effect of electrostatic field gradients, estimated by lattice sums. Allowance must be made for the thermal expansion of the lattice to obtain a consistent interpretation. 
ER  -

